Fio: 3D World editor/game engine
inspired by Radiant and Hammer
Get picks like this daily. Today's launch numbers, the top launches, AI and tech news, and a daily opportunity pick, straight to your inbox.
Want to reach these readers? Sponsor an issue.
A liminal brush-based CSG editor and game engine with unified (forward) renderer inspired by Radiant and Worldcraft/HammerCompact and lightweight (target: Snapdragon 8CX, OpenGL 3.3)Real-time lighting with stencil shadows without the need for pre-baked compilation
HN · launched Mar 26, 2026 · 96 upvotes (top 9%) · 0 views
Niche: game development engines · 85 launches, 1 in the last 7 days ▼ -86% · Explore this niche →
Category and tags
- Horizontal
- Dev tools
- Developer
- Not AI
- Hobby / open-source project
Visit website ↗ Source listing ↗
More like this: all 85 launches in game development engines →
Could you build this?
No Building a custom 3D brush-based CSG engine with forward rendering and real-time stencil shadow volumes requires low-level computer graphics and computational geometry expertise. AI cannot hallucinate robust polygon-clipping, BSP trees, or performant OpenGL/Vulkan rendering pipelines.
What it would actually take: The architecture requires C/C++ or Rust interfacing directly with OpenGL/Vulkan, implementing Constructive Solid Geometry algorithms (such as BSP tree boolean operations or Carve-style clipping), and maintaining a scene graph with stencil buffer shadow volumes. The core challenge is handling numerical precision issues and edge cases in 3D polygon subtraction/union in real-time, plus optimizing forward shading passes on constrained hardware (like Snapdragon). It requires a senior graphics programmer and computational geometry specialist.
Discussion
12 comments analyzed.
Concerns raised: Market is saturated, nearly impossible to get visibility for new engines, BSP approach outdated compared to modern culling and depth buffer techniques, Need distinctive USP to stand out from existing solutions
Feature requests: Angled brushes support, New entity types, Example maps beyond the 14 included
Competitors
Other products that read as similar to this one : 1275 launches clear the similarity bar, closest 8 shown.
Attention rank: #148 of 1276 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 143 days after the earliest competitor.
- stecyk3d · github · 2026-10-23 · 24 upvotes · similarity 0.57
- AnvilCSG · github · 2026-09-14 · 18 upvotes · similarity 0.55
- ciderlight · github · 2026-10-05 · 37 upvotes · similarity 0.55
- xprite-lighter · github · 2026-11-07 · 23 upvotes · similarity 0.54
- Light-sprite-renderer · github · 2026-09-20 · 24 upvotes · similarity 0.54
- MacShade · github · 2026-10-16 · 16 upvotes · similarity 0.53
- A Node Based Editor for Three.js Shading Language (TSL) · hn · 2026-01-22 · 7 upvotes · similarity 0.52
- hoi4-globe-prototype · github · 2026-10-09 · 13 upvotes · similarity 0.52
The niche, labels, vibe code rating and competitor comparison on this page are analysis by Nicheloom. If you use them, please credit nicheloom.com. How you may use our data.